For whatever reason, _systemd-networkd_ does not resepect the DNS domain
search list sent by the DHCP server by default. This means single-label
name lookups will fail in most cases.
`systemd-network-generator`, which parses network configuration from the
kernel command line and generates configuration for *systemd-networkd*,
creates a configuration file with priority 90. This conflicts with our
default network configuration at the same priority, so the configuration
from the kernel command line never gets used. By reducing our default
priority to 95, we ensure that the generated configuration file is read
first and thus overrides the defaults.